/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponentsEditorOnly/Public/ToolTargets/VolumeComponentTarget.h
Get material set provided by this source
virtual void GetMaterialSet ( [FComponentMaterialSet](API\Runtime\InteractiveToolsFramework\TargetInterfaces\FComponentMaterialSet) & MaterialSetOut, bool bAssetMaterials ) const